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.Dd July 9, 2001
.Dt BUF_LOCK 9
.Os
.Sh NAME
.Nm BUF_LOCK
.Nd "locks a buffer"
.Sh SYNOPSIS
.In sys/param.h
.In sys/systm.h
.In sys/uio.h
.In sys/bio.h
.In sys/buf.h
.Ft int
.Fn BUF_LOCK "struct buf *bp" "int locktype"
.Sh DESCRIPTION
The
.Fn BUF_LOCK
function locks the given buffer.
If the lock is already held this
call will block until it can acquire the lock unless
.Dv LK_NOWAIT
is set.
.Pp
Its arguments are:
.Bl -tag -width ".Fa locktype"
.It Fa bp
The buffer to lock.
.It Fa locktype
Flags controlling the type of lock.
See
.Xr lockmgr 9
for details.
.El
.Sh RETURN VALUES
A value of 0 is returned upon success.
See
.Xr lockmgr 9
for
information on non-zero return values.
.Sh SEE ALSO
.Xr buf 9 ,
.Xr BUF_TIMELOCK 9 ,
.Xr BUF_UNLOCK 9 ,
.Xr lockmgr 9
.Sh AUTHORS
This manual page was written by
.An Chad David Aq Mt davidc@acns.ab.ca .
